/
host.go
106 lines (89 loc) · 2.96 KB
/
host.go
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// RAINBOND, Application Management Platform
// Copyright (C) 2014-2017 Goodrain Co., Ltd.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// thanks @lextoumbourou.
package initiate
import (
"context"
"errors"
"github.com/Sirupsen/logrus"
"github.com/goodrain/rainbond/cmd/node/option"
discover "github.com/goodrain/rainbond/discover.v2"
"github.com/goodrain/rainbond/discover/config"
"github.com/goodrain/rainbond/util"
)
var (
// ErrRegistryAddressNotFound record not found error, happens when haven't find any matched registry address.
ErrRegistryAddressNotFound = errors.New("registry address not found")
)
// HostManager is responsible for writing the resolution of the private image repository domain name to /etc/hosts.
type HostManager interface {
Start()
}
// NewHostManager creates a new HostManager.
func NewHostManager(cfg *option.Conf, discover discover.Discover) (HostManager, error) {
hosts, err := util.NewHosts(cfg.HostsFile)
if err != nil {
return nil, err
}
callback := &hostCallback{
cfg: cfg,
hosts: hosts,
}
return &hostManager{
cfg: cfg,
discover: discover,
hostCallback: callback,
}, nil
}
type hostManager struct {
ctx context.Context
cfg *option.Conf
discover discover.Discover
hostCallback *hostCallback
}
func (h *hostManager) Start() {
if h.cfg.ImageRepositoryHost == "" {
// no need to write hosts file
return
}
h.discover.AddProject("rbd-gateway", h.hostCallback)
}
type hostCallback struct {
cfg *option.Conf
hosts util.Hosts
}
func (h *hostCallback) UpdateEndpoints(endpoints ...*config.Endpoint) {
logrus.Info("hostCallback; update endpoints")
if err := h.hosts.Cleanup(); err != nil {
logrus.Warningf("cleanup hosts file: %v", err)
return
}
if len(endpoints) > 0 {
logrus.Infof("found endpints: %d; endpoint selected: %#v", len(endpoints), *endpoints[0])
lines := []string{
util.StartOfSection,
endpoints[0].URL + " " + h.cfg.ImageRepositoryHost,
endpoints[0].URL + " " + "region.goodrain.me",
util.EndOfSection,
}
h.hosts.AddLines(lines...)
}
if err := h.hosts.Flush(); err != nil {
logrus.Warningf("flush hosts file: %v", err)
}
}
func (h *hostCallback) Error(err error) {
logrus.Warningf("unexpected error from host callback: %v", err)
}